As well as struggling with anxiety and depression, Robin Williams, who tragically took his own life on Monday, was also suffering from early onset Parkinson’s Disease.

In a statement released on Thursday, the beloved comedian’s wife, Susan Schneider, says her late husband was “not yet ready to share publicly” that he was battling the degenerative disorder.

ROBIN’S 10 BEST QUOTES: CLICK ON THE IMAGE FOR GALLERYRobin Williams and his wife Susan Schneider

A preliminary investigation concluded on Tuesday that the beloved comedian had died of suicide by asphyxiation. The Mrs. Doubtfire actor was found in his home on Monday morning by his personal assistant who called 911.

Susan added: "Since his passing, all of us who loved Robin have found some solace in the tremendous outpouring of affection and admiration for him from the millions of people whose lives he touched.

"His greatest legacy, besides his three children, is the joy and happiness he offered to others, particularly to those fighting personal battles."

Robin Williams sadly passed away on Monday

Robin’s representative said in an official statement on Monday that the star had been battling severe depression, before adding: "
This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."

Robin had been candid about his battle with alcohol and substance abuse in the past and checked into a treatment facility to "focus on his commitment" to overcome his addictions in July.

Robin began his career as a stand-up comedian, but went on to become a celebrated film actor who excelled in both comedic and dramatic roles. Some of his most memorable films include
Mrs. Doubtfire, Dead Poet’s Society, Aladdin, and Hook, and in 1998, Robin won an Academy Award for Best Supporting Actor for his role in Good Will Hunting.

He is survived by his three children: Zachary Pym, 31, Zelda Rae, 25, and 23-year-old Cody Alan Williams.

Canadian actor Michael J. Fox, a Parkinson’s sufferer and advocate, tweeted the following message to Robin after his passing: “Famously kind, ferociously funny, a genius and a gentle soul. What a loss. #RobinWilliams,” he wrote.

Read Susan Schneider’s full statement:

“Robin spent so much of his life helping others. Whether he was entertaining millions on stage, film or television, our troops on the frontlines, or comforting a sick child — Robin wanted us to laugh and to feel less afraid.

Since his passing, all of us who loved Robin have found some solace in the tremendous outpouring of affection and admiration for him from the millions of people whose lives he touched. His greatest legacy, besides his three children, is the joy and happiness he offered to others, particularly to those fighting personal battles.

Robin’s sobriety was intact and he was brave as he struggled with his own battles of depression, anxiety as well as early stages of Parkinson’s Disease, which he was not yet ready to share publicly.

It is our hope in the wake of Robin’s tragic passing, that others will find the strength to seek the care and support they need to treat whatever battles they are facing so they may feel less afraid.”

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